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2 Hardware Configuration
2.1 Power
The EVM board can be powered from either the Micro-B receptacle (J1) VBUS or from an external power supply
through the barrel jack (J2). The EVM defaults to being powered from the Micro-B receptacle VBUS.
If powering EVM from barrel jack, make sure R54 is unpopulated. Once removed, a jumper will need to be
placed across JMP19 pins 1 and 2.
The USB Type-C receptacle VBUS uses TPS25820 as the VBUS power switch needed for USB Type-C
systems. Power is sourced from the Micro-B receptacle VBUS by default. JMP1 can be used to change the
power source at the USB Type-C receptacle VBUS pins.
If powering USB Type-C VBUS from barrel jack or other source, make sure R14 is unpopulated. Once removed,
a jumper will need to be placed across JMP1 pins 1 and 2 to use power form the barrel jack. If a different
external power source is used, connect the source directly to JMP 1 pin 2.
Note
Limit VBUS voltage and voltage from barrel jack to no more than 6 V.
2.2 Configuration Jumpers
Multiple jumpers are provided on the EVM for configuration of TUSB1142 and also for probe points.
The following is a list of 4-level jumpers which are used to configure the TUSB1142: JMP6, JMP7, JMP8, JMP9,
JMP10, JMP11, JMP12, and JMP13. The jumper position to select between the different levels is detailed in
4-level Configuration Jumper Settings Table .
Note
4-level pins are sampled on rising edge of EN pin. Therefore, a change in any 4-level pin state will not
be applied until after EN pin is toggled from low to high.
Table 2-1. 4-Level Configuration Jumper Settings
Jumper Position 4-level State
Short 5 to 6 0
Short 3 to 4 R
Open F
Short 1 to 2 1
Table 2-2. Jumpers
Jumper Default Position Description
JMP2 Open CC1. Pin 1 is probe point for CC1
JMP3 Open CC2. Pin 1 is probe point for CC2
JMP4 Short 3 to 4 FLIP/SCL.
If TUSB1142 is configured for I2C mode (MODE pin (JMP13)) is floating, then jumper is
clock for local I2C. Ensure R19 is populated.
If TUSB1142 is configured for pin-strap mode, then this jumper controls the internal 2:1
mux.
•
By default this pin is controleld be U2 based on the CC pin configuration.
If manual control is desired, ensure that R19 is populated :
•
Short 1 to 2: CRX1 -> SSRX and SSTX -> CTX1.
• Short 3 to 4: CRX2 -> SSRX and SSTX -> CTX2
www.ti.com Hardware Configuration
SLLU350 – APRIL 2022
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TUSB1142 EVM User's Guide 3
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